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Consider the level control loop shown in Figure Q3 below. The steady state operating conditions are fi= fo = 35 m³ h-1 and h = 2 m. For this steady state, the FC valve requi a 50% signal. The level transmitter has a range of 0 to 6 m. A proportional only controller, with Kc = 1, is used in this process. (a) (b) Fi(t) h(t) LT LC SP Fo(t) FO Figure Q3: Level control loop Describe how this level control loop works and choose the appropriate level controller action. Discuss briefly the advantages and disadvantages of this control strategy.

Consider the level control loop shown in Figure Q3 below. The steady state operating conditions are fi= fo = 35 m³ h-1 and h = 2 m. For this steady state, the FC valve requi a 50% signal. The level transmitter has a range of 0 to 6 m. A proportional only controller, with Kc = 1, is used in this process. (a) (b) Fi(t) h(t) LT LC SP Fo(t) FO Figure Q3: Level control loop Describe how this level control loop works and choose the appropriate level controller action. Discuss briefly the advantages and disadvantages of this control strategy.

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Consider the level control loop shown in Figure Q3 below. The steady state operating conditions are fi= fo = 35 m³ h1 and h = 2 m. For this steady state, the FC valve require a 50% signal. The level transmitter has a range of 0 to 6 m. A proportional only controller, with Kc = 1, is used in this process. (a) (b) Fi(t) h(t) LT FO Figure Q3: Level control loop SP Fo(t) Describe how this level control loop works and choose the appropriate level controller action. Discuss briefly the advantages and disadvantages of this control strategy.
Transcribed Image Text:Consider the level control loop shown in Figure Q3 below. The steady state operating conditions are fi= fo = 35 m³ h1 and h = 2 m. For this steady state, the FC valve require a 50% signal. The level transmitter has a range of 0 to 6 m. A proportional only controller, with Kc = 1, is used in this process. (a) (b) Fi(t) h(t) LT FO Figure Q3: Level control loop SP Fo(t) Describe how this level control loop works and choose the appropriate level controller action. Discuss briefly the advantages and disadvantages of this control strategy.
(a) Describe how this level control loop works and choose the appropriate level controller action. (b) Discuss briefly the advantages and disadvantages of this control strategy. (c) FO Figure Q3: Level control loop (d) Fo(t) Identify the three basic control components, their actions, and the controlled variable, manipulated variable and main possible disturbance for this process. Calculate the offset if the inlet flow increases to 40 m³ h-1 and the valve requires 57% to pass this flow. Report the offset in % of scale and in meters.
Transcribed Image Text:(a) Describe how this level control loop works and choose the appropriate level controller action. (b) Discuss briefly the advantages and disadvantages of this control strategy. (c) FO Figure Q3: Level control loop (d) Fo(t) Identify the three basic control components, their actions, and the controlled variable, manipulated variable and main possible disturbance for this process. Calculate the offset if the inlet flow increases to 40 m³ h-1 and the valve requires 57% to pass this flow. Report the offset in % of scale and in meters.
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